/Engine/Plugins/Importers/USDImporter/Source/UnrealUSDWrapper/Public/UsdWrappers/UsdPayloads.h
bool AddPayload ( const [FString](API\Runtime\Core\Containers\FString) & Identifier, const [FSdfLayerOffset](API\Plugins\UnrealUSDWrapper\UsdWrappers\FSdfLayerOffset) & LayerOffset, [EUsdListPosition](API\Plugins\UnrealUSDWrapper\EUsdListPosition) Position )